From what I can see, Stone Striker is there to convert physical damage to Earth in order to trigger the +30AL vs. elemental damage on your armor. Anything else that does this will work (Only thing I can think of is Greater conflagration, but thats elite).
Stoneflesh is probably essential, though you might be able to use a block stance instead (though your energy management (storm chaser) won't work, as they are both stances).
Whirling Defense is a pathetic replacement for Sliver. Sliver will deal WAY more damage; it does 3x as much damage per trigger and triggers on melee attacks as well as spells in addition to just projectiles like WD.
Don't think this is going to work.
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